Control means



F. H. OWENS CONTROL MEANS May 1o, 193s.

original Filed Aprii'ze, 195s 9 Sheets-Sheet l his mN\ Sy iii;

' May 10, 1938. F. H. owENs 2ll7,254

CONTROL MEANS Original Filed Apr-il 28, 1933 9 Sheets-Sheet 2 May 10, 1938. F. H. owENs 2,117,254

CONTROL MEANS Original Filed April 28, 1933 9 Sheets-Sheet 3 ByW%J// TORNE Y.

F. H. OWENS CONTROL .MEANS May l0, 1938.

Original Filed April 28, 1933 9 Sheets-Sheet 4 F. H. OWENS CONTROL MEANS May 10, 1938.

9 sheets-sheet 5 Original Filed April 28, 1933 Fm u umm .limi

May 10, 1938.

F. H. OWENS CONTROL MEANS Original Filed April 28, 1933 9 Sheets-Sheet 6 mill I A IIIHI" 'llll INVENTOR. /fffmw H. UWM/.z

May 10, 1938. F. H. owENs 2,117,254

CONTROL MEANS Original Filed April 28, 1933 9 Sheets-Sheet 7 m i I N VEN TOR. REE/MMM dwf/nr.

BY f7 TTORNE Y.

May 10, `1938. F. H. owENs y 2,117,254

` CONTROL MEANS Original Filed April 28,. 1933 Sheets-Sheet 8 c INVENTOR. R k EPEE/v4# Ome-M9.

F. H. OWENS CONTROL MEANS May 10, 1938.

Original Filed April 28, 1933 9 Sheets-Sheet 9 Patented May l0, 1938 UNITED STATES PATENT OFFICE Application April Renewed 18Claiml.

My invention relates to control means and particularly to an automatic control for valves used in steam lines and the like and designed to automatically regulate and maintain the desired pressure in the various outlets of a steam line.

As the description of the invention proceeds, it will be obvious that the invention is equally adaptable to'other uses than steam pressure control, such as other fluid or air lines. It will also be apparent that the controlling means per se, is adaptable for use in other arts and for other purposes than valves. Inasmuch as the controlling device is particularly adaptable for valve controlling action, it has been so illustrated and described herein.

Primarily the invention comprises a controlling and, adjusting means for a pivoted lever, the angular positions of which determine the adjustment of the device under control. For instance, when used as a valve control as illustrated herein, the pivoted lever by variations in its position about its pivot point controls the position of the valve with respect to its seat in order to regulate the amount of flow .through such valve.

Before entering upon a detailed description of the invention, one particular use ereof will be described as an aid to the under ding of the application of the invention. 'I'here are many places such as large factories where steam is used s to a large extent both for heating and for power purposes. Usually there is a plant furnishing steam in large quantities which is piped to various buildings and to various rooms in the buildings where it is drawn from the main line and applied for whatever purposes required. It is a real problem of economy as well as in effective operation that the steam pressure at the various outlets or points of use be kept under constant and accurate control. Particularly is it important in many instances, that an absolute uniform pressure be maintained during certain periods of operation of the factory. Also it is highly desirable and important that periodical changes in pressure be made at certain outlets such as for instance when the factory shuts down at night, as the steam requirements are not so high and the pressure can be reduced.- In other words, there are generally fairly well deil'ned periods during which maximum and minimum steam pressure requirements are called for, and often with intermediate stag I have provided .a valve controlling means which fully meets these problems and provides ilrst an outlet and sensitive control whereby the zs. lass, ser-ln N. scans ombel- 1, im

An important feature of my invention lies in the fact that regardless of the major vchange in pressure due to the periodic control, a controlling device 'operates to always maintain 4the pressure at its adjusted amount. In other words, if the pressure at a certain period is 10 lbs., my controlling device maintains that pressure accurately. If the pressure is reduced to 5 lbs. my invention likewise then maintains the pressure at 5 lbs.

One of the features of my invention lies-in the provision of an ingenious mechanism, controlled from a pressure gauge, for automatically maintaining the desired Vpressure in the outlet side of a steam line and which includes an electric contact maker and breaker operable in either direction and which actuates a weight shifting means on the valve controlling lever to regulate the valve opening to compensate for such variations as may occur normally in the use of the steam line.

The second important feature of my invention lies in a time controlling device which at predetermined intervals also actuates another weight on the valve arm for changing the valve opening topermit increased or decreased on the outlet side'of the valve. i

My invention is adaptable for use with a valve of the balanced type, that is, a valve provided with double seats and valve surfaces together pressure iiow 3Q with passages for the admission of pressure alike to corresponding valve surfaces whereby the valve is balanced by the pressure itself at the adjusted position so that the weighted lever which regulates the position of the valve disk members with respect to their valve seats merely maintains and regulates the valve disk members in such balanced position.

There are many detailed objects and advantages as wel] as novel features of my invention which will appear as the description proceeds.

such as the contact maker and breaker device, the weight shifting means actuated thereby, the locking means for the contact maker and breaker, the timed controlling device and other 5 elements and features.

My invention eliminates the necessity for the well known, troublesome diaphragm control for valves, in common use for years.

Referring now to the drawings forming a part u of my invention and wherein like reference numerals indicate like parts:

Figure 1 is a general view somewhat diagrammatic, illustrating the application of my invention to a steam pressure line.

Figure 2 is a detail view of the general front assembly of the parts 0I my invention, certain parts being broken away for clearness of illustration.

Figure 3 is a sectional view taken on the line 3 3 of Figure 2.

Figure 4 is a detail view illustrating the releasing device actuated by the contact maker and breaker.

Figure 5 is a detail view illustrating the type of pressure gauge adaptable for this invention.

A Figure 6 is a side view of the timing control device, certain parts being broken away for clearness.

Figure 7 is a detail sectional view taken on the line 'I-'I of Figure 6 and illustrating the timing strip.

Figure 8 is a detail view similar to Figure 7 but omitting the timer strip for clearness.

vFigure 9 is a detail sectional view of one of the weight devices used in connection with the valve lever, taken on the line 9-9 of Figure 12.

Figure 10 is a detail .view illustrating the weight moving device.

Figure 11 is a detail sectional View taken on the line II-I I of Figure 9.

Figure 12 is a detail sectional view through one of the weight mechanisms on the valve lever.

Figure 13 is a detail sectional view taken on the line I3-I3 of Figure 12.

Figure 14 is a detail -sectional view taken on the line Il--II of Figure 13.

Figure 15 is a sectional view of a balanced valve such as my controlling device is adapted for, and illustrating the regulating lever in connection therewith.

Figure 16 is a detail view of the valve itself in open position.

Figure 17 is an end view of the contact maker and breaker, certain parts being broken away and others shown in section, for clearness.

Figure 18 is a cross sectional View of the contact maker and breaker taken on the line l8-I8 of Figure 17.

Figure 19 is a detail view oi' the locking device for the contact maker and breaker, taken on the line I9-I9 oi' Figure 18.

Figure 20 is a top sectional view of an indicating means for showing the pressure in the line and the position of the predetermining regulating means.

Figure 21 is a top plan view of the actuating means between the pressure gauge pointer and the contact maker and breaker, and including a top plan View of an indicating mechanism and the contact maker and breaker, taken on the line 2I-2I of Figure 2.

Figure 22 is a detail sectional view of the lower end oi the actuating lever taken on the line 22`22 of Figure 24.

Figure 23 is a detail front View thereof in its upper position.

Figure 24 is a detail view oi' the lower end of one of the actuating levers in its lowered position.

Figure 25 is a detail view illustrating a recording attachment for my apparatus.

Figure 26 is a diagrammatic illustration of the electrical circuits involved in my invention as illustrated and described herein.

Figure 27 is a detail view illustrating the switch member for manual and remote control.

Referring now more particularly to the iigures and iirst to Figure 1 of the drawings, the reference character l indicates the inlet pipe of a steam pressure line connected with any suitable source oi steam pressure. I'hls pipe communicates with a valve generally indicated at 2 and the details of which will be later described. Suffice it to say at this point, that the valve is a balanced valve and is provided with the upwardly extending valve stem 3 with which is engaged as at 4 a lever 5 pivoted at 5 to a guide bracket l provided on the valve casing. Suitably secured to the lever 5 as by the fastening means 8, and on opposite sides of the pivot 6 of such lever are weight housings 9 and I0 respectively. The purpose' and the construction of the mechanism in these housings will appear as the description proceeds, it being suiiicient at this point to simply note that in eachhousing there is provided a weight member adapted to be moved longitudinally of the lever in order to iniiuence the position of the lever on its pivot 6.

The pipe II communicates with the outlet side of the valve 2 and runs to any desired point or points of steam use such as heating appliances, steam power devices or other ultimate outlets where the steam passing through this pipe Il may be utilized.

Interposed in this outlet pipe II at any desired point and communicating therewith is a pipe I2 leading to a pressure gauge indicated generally at I3 and the details of which will appear as the description proceeds.

So far it will thus be seen that I have provided a valve in a steam line provided with weight regulating means for the valve and a pressure gauge in the outlet side oi' the line to indicate the pressure therein. The description will now proceed to the controlling and actuating means for the valve controlling weights whereby in response to pressure changes the position oi' the valve will be automatically adjusted to compensate for such changes in order to maintain a uniform pressure, and also to the timing mechanism for causing major changes in the position of the valve in order to periodically and automatically vary the pressure in the outlet pipe II.

With reference now to Figure 15 of the drawings, it will be noted that within the valve casing 2 there is provided a supporting bracket Il of substantially U-shape, the lower and upper sides of which are provided with open seats Il and I 6 respectively, cooperating with the valve disks I'I and I8 respectively, carried on the lower end of the valve stem 3. 'I'his valve structure is provided with the usual guiding Webs I 9 and is adapted upon the raising or lowering of the valve stem 3 to move the'dlsks I1 and I8 away from or towards the seats I5 and I6 whereby to adjustably admit the steam or other iluid past the disks and to the outlet side of the valve. The details of this valve and its assembly and associated parts are well known in the art and need not be further described.

The upper end of the valve stem 3 is provided with a lever engaging member 20 through which the lever 5 passes and by virtue of which the lever is rendered operative with relation to the valve. Obviously rocking the lever 5 on its pivot 6 will result in adjusting the position of the top surfaces of the valve disk Iland the lower surface of the valve disk |1 and also if the valve.

is in open position, as illustrated in Figure 16, the pressure admitted through the valve seats will exert itself equally against the underside of the valve disk I3 and the upper side of the valve disk I'l. 'I'hls obviously results in a balanced condition of the valve assembly so that very little force is required on the lever 5 to change the valve adjustment. I'he weight members on the lever 5, hereinafter described more fully, are so adjusted with respect to the pressures for which the valve is used, that they contribute to this balanced condition.

Referring now to Figures 3, 4, and 5 of the drawings, the pressure gauge illustrated is a common type of pressure responsive mechanism including the expansible tube 2| communicating with the pipe l2 whereby the expansion of the tube 2| is translated into rotation of a pointer shaft 22 by means of a link 23 fastened at one end to the closed end of the expansible tube 2| and at its opposite end to a slotted link 24. This slotted link 24 is secured as at 24a to the link 24b pivoted as at 25 to a fixed bracket 23 and carrying a toothed rack segment 21 meshing with a pinion 23 on the pointer shaft 22. Secured to the end of the pointer shaft 22 is a pointer 23 which is movable over the face of a dial 33 graduated in proper units, such as pounds and ounces, whereby the pressure as it affects the gauge tube 2| is indicated on the dial.

With reference now to Figures 2, 3, and 21, it will be noted that there is mounted upon the pointer shaft 22 and keyed thereto for rotation therewith, a bushing or collar 3| (see Figure 2l) upon which is suitably mounted a gear 32 meshing with a pinion 33 upon a stub shaft 34 upon which is also mounted a gear- 35 meshing with a pinion 33 secured upon one end of a shaft 31. Obviously therefore, upon rotation of the pointer shaft 22 responsive to a change in pressure in the line, the shaft 31 will be rotated in one direction or the other depending upon whether the pressure gauge responds to an increase or a reduction in pressure, the gear train just described providing the communicating means of the movement from the pointer shaft to the shaft 31.

The shaft 31 which is directly responsive to the changes in pressure of the pressure gauge, through the medium of the gear train just described and including the pinion 36 on the end of such shaft 31, forms an important part of the electrical contact maker and breaker which, as the description proceeds, will appear as a vital controlling factor in the operation of this invention.

Suitably fixed upon the shaft 31 (see Figures 17 and 18)` and properly insulated therefrom, are a plurality of contact members 33, there being shown three of these members although more or less may be provided if desired. These contact members 33 are preferably short extensions of a strip of a conducting material extending on both sides of the shaft 31, and may be formed as a single stamping. These contact members will hereafter be referred to as vanes. Pinned upon one end of the shaft 31, adjacent the pinion 36, is a ratchet wheel 33 for a purpose to be described. Suitably seated adjacent each end of the shaft 31 for rotation therewith, are bushings 43 provided with grooves 4| engaging ball bearings 42 which also engage within similar grooves 4|a provided in bushings 43 comprising the end mem- Y bers of a cylindrical drum 44 surrounding the shaft 31 and within which .theshaft 31 is rotatable as previously described.

The drum or cylinder 44 is provided on its outei surface with bushings 43 provided with grooves to receive ball bearings 43 also engaging within grooves provided in the iixed supporting bracket 41, whereby the drum 44 is rotatably 'mounted on the ball bearings 43 in order that it may rotate around and independently of the shaft 31. 'I'he means for causing the cylinder or drum to rotate will be more fully pointed out later.

suitably mounted on the drum 44 and properly insulated therefrom, are a plurality of contact pins 43, the lower ends of which project through the drum and extend thereinto in the path of movement of the contact vanes 33. There are four sets of these contact pins 43, one set being positioned on each side of each end of the vanes 33, as clearly illustrated in Figure 17. 'I'he position of these contact pins 43 with respect to the vanes 33 is such that if the shaft 31 is moved in either direction, both ends of the vanes will contact the pins 43 lying in their path. In other words rotation of the shaft 31 in either direction will immediately result in engagement of both ends of the vanes 33 with two sets of the contact pins 43.

It may be helpful to an understanding of the purpose of this mechanism to state at this point l that the movement of the shaft 31 and consequently the vanes 33, in either direction by the pressure gauge results in making electrical contact through the contact pins 43 which results in setting in motion the weight shifting means to be described, whereby the position of the lever 5 is adjusted and consequently the valve opened or closed to permit an increase or decrease in pressure flow therethrough. depending upon the actuation of the gauge responsive to a pressure variation and such gauge action determining the direction of rotation of the shaft 31. Obviously the result intended is to cause a weight adjustment on the lever which will adjust the valve to compensate for the original variation in pressure in order that the desired pressure' may be automatically restored and maintained.

Without going at this time into a detailed description and discussion of the electric circuits involved, and leaving for the moment further description of the contact maker and breaker and its operation, reference should now be had to Figure 2 of the drawings. In this figure it will be noted that there is provided preferably an electric motor 43, although any other source of continuous power maybe provided, which motor drives a shaft 53 provided at vits end with a miter gear 5| meshing with a miter gear 52 on a shaft 53. This shaft 53 is intended for continuous rotation, receiving its source of power from the motor 43. Fixedly mounted upon this shaft 53 at a plurality of spaced points are toothed ratchets 54 and 54a (see Figures 2 and 4). Also mounted upon the shaft 53 but rotatable lthereon, and directly adjacent the-ratchets 54 and 54a are the eccentrics or cams 55 and 55a respectively, pivoted to each of which at 56 is a pawi 51 and 51a respectively adapted to cooperate with the adjacent ratchet. Formed as an integral part of each of the cams 55 and 55a and oilset laterally .therefrom is a supporting member 58 and 58a respectively, each provided with an anchor bar 59. One end of a coil spring 80 is secured to each anchor bar and the opposite ends engage pins 8| on the pawls 51and 51a whereby such pawls are normally urged into ratchet engaging position. These supporting members 58 and 58a are also provided with pins 62 and 52a respectively, lying in the paths of the pawls 51 and 51a to act as stops therefor in certain positions of actuation of said pawls as will hereinafter appear.

Pivoted as at 53 lat a point adjacent the pawl 51 is a latch arm 64 notched at its free end as at 85 for cooperation with .the free end of the pawl 51. This latch 64 is provided on its upper side with an armature member 66 whereby such latch may be attracted and lifted upwardly to the position shown in Figure 4 by an electromagnet 61. The normal position of these parts just described is as follows: The magnet 511s normally not energized and therefore the latch 64 is in its lowermost position with its notched end 85 engaging the end of the pawl 51, in which position such pawl is held out of engagement with the ratchet 54 which rotates freely with the shaft 53. If, however, the magnet 61 is energized and the latch raised to the position shown in Figure 4, the pawl 51 will, under the influence of spring 6D, engage the ratchet 54 and cause the cam 55 to rotate with the shaft 53 until .the magnet 61 is de-energized and the latch again drops to pawl engaging position where it rides on the surface of the rotating pawl until the free end of the pawl reaches the end of the latch, whereupon it drops in front of the pawl and the same is disengaged from the ratchet 54 and the cam ceases to rotate with the shaft 53.

It should be stated here, and in connection with Figure 2, that for each contact maker and breaker of the vane and drum construction previously described whichv may be provided at various outlets in the steam line, there is provided the mechanism Just described including the continuously rotating shaft 53 and two of the magnets 61 and two complete cam assemblies such as illustrated in Figure 4, preferably positioned directly adjacent each other whereby the pawls 51 may cooperate with a single ratchet 54. The reason for this duplication of magnets and cams will be apparent shortly.

To bring the operation of the mechanism so far described clearly to mind, let it be assumed at this point that a slight increase in pressure has occurred in the outlet pipe Il and the gauge tube 2| has responded to such increase in pressure resulting, through the gear train described, in rotating the shaft 31 in one direction. Upon such rotation the contact vanes 38 engage the contact pins 48 lying in their path of movement in that direction, for instance, to the left in Figure 17, resulting in energizing one of the electromagnets 61, for example the left hand magnet in Figure 2. Such magnet when energized attracts the armature 66 of its corresponding latch 64 raising the same out of pawl engaging position whereupon the cam 55 is caused to rotate with 'the shaft 53 through the mechanism previously described.

If the pressurein the pipe il decreased instead of increased, the gauge tube 2| would respond .to such decrease causing rotation of the shaft 31 in the'opposite direction from that j'ust described, whereupon the contact vanes 38 would engage the contact 'pins 48 on the opposite side of the varies from those just described, resulting in energizing the magnet 51 on the right hand side in Figure 2 causing its corresponding latch 64 to be raised and its corresponding cam 55 to rotate with .the shaft 53.

'Ihe releasing of either of these cams 55 to rotate with the shaft 53 brings about the following results.

Pivoted to the same pivot member 53 as the latch 54, there is provided for each of the cams 55 an arm 58 (see Figure 3) rotatably mounted upon which intermediate its ends is a roller 58 the periphery of which rides upon the periphery of the cam 55. Secured to the free end of the arm 68 is a vertically disposed bar 10 adapted to be raised or lowered by the arm 68 when the same is raised or lowered by virtue of rotation of the cam. Each of the bars 10 is provided at its upper end with an upwardly projecting extension 1I cooperating with a contact maker and breaker 12 of any preferred type for a purpose to be described. At this point reference should again be had to Figures 2, 3, 18, 19, 22, 23, and 24 of the drawings, and particularly to the ratchet 38 on the shaft 31 of the contact maker and breaker previously described. Suitably pivotally mounted on each side of the ratchet 39 is a locking pawl 13 shown clearly in Figure 19. A c'oil spring 14, normally urges these locking pawls into engagement with the teeth of the ratchet 38. Carried by each of the locking pawls 13, however, is a laterally extending pin 15, the forward end of which is bent as at 15 to provide a crank arm normally engaging the lower inner edge of the corresponding bar 10. The positioning of these crank members16 with respect to the lower ends -of the bars 10 is such that with the bars in their normal lowermost position, as shown in Figure 2, the crank pins are rocked inwardly resulting in holding thevlocking pawls 13 out of engagement with the ratchet 38 against the tension of the spring 14. Thus, so long as the bars 10 are in their normal lowermost position, the shaft 31 of the contact maker and breaker is free to be rotated by the mechanism previously described.

If now one of the magnets 51 is energized through operation of the contact maker and breaker, the cam ,55 corresponding'to such magnet will be rotated with the shaft 53 and obviously rotation of such cam will result in raising the corresponding bar 10. The initial raising of such bar permits the crank pin 16 to rock on its pivot. As the bar 10 is raised away from the crank pin, it permits thev corresponding locking pawl 13 to engage with the teeth of the ratchet 38 thus locking the shaft 31 against further rotation. The lower end of each of the bars 10 haspivoted thereto a pawl 11 (see Figures 2 and 3). Thel end of the drum 44 of the contact maker and breaker, opposite the ratchet 38, is provided on its outer surface with a toothed gear 18 adapted for cooperation with the pawls 11. In the normal lowermost position of the bars 10, these pawls 11 are out of engagement with the gear 18. Upon raising either of the bars, however, the pawl carried thereby engages with the teeth of such gear and rotates the drum 44 a sufllcient distance to disengage the contact pins 48 from the contact vanes 38. It should be stated here that the operation of the locking pawls 13 on the vane shaft 31, and the pawls 11 with relation to the drum gear 18. is so timed that the locking operation of the shaft 31 is accomplished immediately prior to the rotation of the drum by the pawl 11. This is in order that there can be no further rotation ofthe shaft 91 until the drum has been moved to disv engage the contact pins 98 from the vanes 89.

Obviously immediately upon such operation of the contact pins and vanes, the magnet 81 will be de-energized resulting in the latch 89 dropping into locking engagement with the pawl 81 and disengaging the cam 88 from further rotation with the shaft I9. This cam 88 and the operation of this mechanism just described is so timed that from the initial energizing of the magnet 91, by virtue of the vane shaft moving its contact vanes into contact with the contact pins I8, until the cam is disengaged from the shaft again, is such that only one revolution of the cam 88 is accomplished. Obviously therefore, upon return ofthe cam to its normal position, the arm 98 and bar 19 return to their normal lowermost positions, whereupon the actuating pawl 11 is disengaged from the gear 18 and the locking pawl 13 is disengaged from the ratchet 89.

As previously explained the operation Just described is the same in either direction of rotation of the shaft 91. 'Ihe duplicate parts including the bars 10, cams 85, and actuating pawls 11, make possible the rotation of the drum in which ever direction the shaft 11 is rotated. By virtue of the ingenious construction of this contact maker and breaker it will be seen that repeated operations through wide changes in pressure either above or below normal will result in continued and repeated step by step movements oi the shaft 31 and the drum 49, the drum following the rotation of the shaft in either direction step by step without limit as to such rotation.

With reference again to the extension arms 1l, it may be explained that as they are raised with the arms 19, they actuate, in timed relation, the contact maker and breaker 12 cooperating therewith to break the circuit to the other magnet 61 whereby there can be no chance of that magnet being energized until the other has been deenergized. These contact makers and breakers also serve another purpose regarding the shifting of the weights in housings 9 and i9 as will hereinafter appear.

Referring now to Figures l, and 9 to 13 inclusive, attention is again called to the weight housings 9 and I9 secured upon the opposite ends of the valve lever 5. Disregarding the weight housing 9 and its contents for the time being, specific reference will be made to weight housing I9. Suitably mounted in this housing are spaced bearings 19 of the bali type rotatably supporting a screw threaded shaft 99 positioned longitudinally of the housing and of the lever 5.' Mounted upon this shaft 99 and provided with thread engaging teeth 9| is a weight'92 adapted for movement along the shaft in either direction depending upon the direction of rotation of such shaft. 'Ihis weight is guided in its longitudinal movement by neans of an upstanding rib 93 provided on the bottom of the housing i9 and engaging within a slot 8l in the lower end of the weight 92'.

Fixed upon one end'of the shaft 99 is a toothed sprocket 99 by means of which the shaft may be rotated in either direction. The rotating means for this shaft comprises a pair of solenoids 99, the armatures 91 of which are adapted to project downwardly on opposite sides of the sprocket 85. The lower ends of these armatures carry vertically disposed pivoted arms 98 to the lower ends of which are pivoted actuating pawls 99 adapted for engagement with the teeth of the sprocket 85.

'111e normal position of the armatures 81 of the solenoids is downwardly with the pawls 98 non mally out of engagement with the sprocket. If either solenoid is energized, however, its armature 81 will be drawn upwardly resulting in the pawl I9 carried thereby engaging in its upward movement with a tooth of the sprocket 88 resulting in rotating such sprocket and the shaft 88 one step. When the solenoid is de-energized, its amature and the corresponding pawl 88 is again 'lowered out of sprocket engaging position.

'Ihe energizing of the solenoids 88 is brought about by the upward movement of the extensions 1I on the bars 19 cooperating'with the contact makers and breakers 12 (see Figure 3). Likewise the solenoids are de-energized when such bars are again lowered by the operation previously described.

It will be clear that the direction of rotation of the shaft 99 depends upon which of the solenoids 99 is energized and this, of course, depends upon whether the pressure has increased or decreased, thus operating through the various agencies heretofore described, the contact maker and breaker cimprising essentially the shaft 91 and the drum Obviously also movement of the weight 82 in one direction or the other on the shaft 89 results in a slight variation in the position of the valve lever 8 to increase or decrease the valve opening, depending upon the direction of such travel. For instance, if-the normal pressure is set for lbs. and such pressure drops the agencies just described will so operate as to move the weight to the left in Figure 1 to thus rock the valve lever' 5 slightly upwardly on its pivot resulting in opening the valve to admit more pressure to the outlet pipe Il in order to compensate for such decrease in pressure. 'Ihe operation is identical if the pressure increases and thus the desired pressure is automatically maintained without the attention of operators and without regard to the variation in the use of the steam available in the outlet pipe il.

As was pointed out generally in the introductory portion of this specification, this invention is so designed that in addition to automatically maintaining a predetermined pressure in a steam line, it may operate automatically to materially change the valve setting in order to provide a major change in pressure at predetermined intervals. 'I'his is useful where the steam requirements of, for instance, a factory. may change periodically or at predetermined intervals such as for instance when the factory shuts down at night and opens again in the morning.

To this end I have provided a second weight shifting mechanism for the valve lever 8 operable at selected predetermined intervals to produce a major change in the adjustment of the valve. This mechanism Will now be described, particular reference being had to Figures l, 2 and 6 to 8 inclusive.

'The continuously driven shaft 58 (see Figure 2) is provided at one end with a pinion 99 meshing with a gear 9| forming the first of a series of gears and pinions 92 providing a speed reduction gear train, the last gear 93 of which is mounted upon a shaft 94 upon which is slidably and rotatably mounted, a toothed sprocket 98, the teeth 96 of which are adapted to engage in perfor-ations 91 provided along one edge ofatimer strip 99. One edge of the timer strip 88 is notched as at 99 to provide a cam-like edge adapted to be engaged by a roller |99 carried at the upper end of an arm |0| mounted at its lower end upon a pintle |02, supported by a bracket |02a. Also pivoted to this pintle |02 is the upper end of an arm |03 extending downwardly and having its lower end connected by a link |04 to the upper end of an arm |05 suitably pivoted at |06 and carrying at its lower end a toothed rack segment |01. Obviously therefore, the rocking of the arm |0| by virtue of the roller |00 riding into and out of the notches 99 of the timer strip, will cause the toothed segment |01 to oscillate about the pivot |06, the direction of oscillation depending, of course, upon the direction of movement of the roller |00 on the timer strip.

The toothed segment |01 meshes with a pinion |08. Mounted upon the shaft of this pinion is a gear |09 forming a part of a gear train with gears and pinions ||0, the last of which comprises a pinion on a shaft 31a corresponding in every respect to the contact vane shaft 31 of the contact maker and breaker previously described. For the sake of brevity and clearness, the details of this contact maker and breaker of which the shaft 31a is a part have not been shown inasmuch as they are identical in every respect with the contact maker andbreaker previously described, and including the contact vanes, the rotatable drum, the contact pins on the drum, and all the other elements as clearly illustrated in Figures 17 and 18. In Figure 2 many of these duplicate parts are shown and will be referred to generally and designated with reference characters the same as those used on corresponding parts previously described but distinguished by the addition of the letter a. These parts include the gear 18a for the drum of the contact maker and breaker, the arms 10a corresponding to the arms 10, the actuating pawls 11a cooperating with the gear 18a, the crank pins 16a corresponding to the crank pin 16 for controlling the locking means for the shaft 31a, the electromagnets 61a corresponding to the magnets 01, the upper extension 1|a corresponding to the rods 1|, and the contact devices 12a cooperating therewith. Likewise the ratchet 54a, the cams 55a, the pawls 51a, the supporting portion oi' the cams 58a, the stop pins 62a and the latch arms 64a. Many of these duplicate parts have been previously referred to.

The operation of this mechanism is exactly the same as that previously de'scribed for actuating the Weight 82 in the housing I0 and as will appear shortly, this mechanism similarly actuates a weight within the housing 9.

Within the housing 9 on the valve lever 5 is an assembly of parts which is in every respect an exact duplicate of those shown and described in the housing I0. For clearness and for brevity and to avoid needless duplication of illustration and description, reference may be had to Figures 9 to 13 inclusive for these parts.

As before described actuation of either of the contact makers and breakers 12a results in energizing the corresponding solenoids in the housing 9 to shift the Weight therein.

The operation of this part of the mechanism is as follows: The timer strip 98 is previously cut with the desired notches 99 in desired timed relation to the movement of the sprocket 95 so that at selected predetermined times such notches will result in rocking the roller |00 and the mechanism controlled thereby in the desired direction, such direction, of course, being determined by whether the pressure is to be increased or decreased through the valve. The timer strip is then engaged on the sprocket and allowed to be moved thereby through the gear train 92 driven from the shaft 53. This timer strip may be of an endless type or may be wound from one support to another, and is preferably charted in units of hours and minutes. As the roller |00 moves into a cam notch at a predetermined time the rack segment |01 is oscillated in the corresponding direction resulting in rotating the contact vane shaft 31a, through the gear train |I0. From this point the operation is identical with that previously described in that the corresponding magnet 61a is energized, releasing the latch 64a, permitting the cam 58a to rotate and the arms 10a and 1|a to be raised, incidentally locking the shaft 31a and immediately thereafter rotating the gear 18 of the contact maker and breaker drum to break the circuit to the magnet 61a, previous to which however, the appropriate contact 12a has been actuated to energize the appropriate solenoid in the weight housing 9 to cause the weight therein to shiftin the desired direction. It will be understood, of course, that if the travel of the roller |00 is for a considerable distance in order that a maior change in the position of the valve may be effected, the operation just described will be repeated a suiiicient number of times to move the weight the desired distance, the length of travel of the weight depending upon the amount of movement of the roller |00 on the timer strip. Obviously the cam edges of the strip may be arranged regularly or irregularly depending upon the periods of change in pressure desired.

It will be clear that inasmuch as the various predetermined changes may be desired or required, there may be quite a number of timer strips made up and it will be obvious that in placing the timer strip on the sprocket 95, care must be used that it is so placed with relation to the gear train drive 92 that the effective notches or cam surfaces of the strip will arrive at the roller |00 at the proper times.

Also in order that the timer strip may be properly adjusted to the roller |00 at a given point when it is placed on the sprocket, the sprocket 95 is slidably keyed upon the shaft 94 against the tension of a 'spring 2 (see Figure 8). The shaft 94 is threaded at its outer end as at ||3 to receive an adjusting ring ||4 by which the sprocket 95 may be moved longitudinally of the shaft 94 against the tension of the spring to proper position with respect to the timer strip and roller. I'he sprocket is then locked for rotation with the shaft and adjusting flange ||4 by means of the set screw l5.

It will also be observed particularly with reference to Figure 6, that on the pintle |02 there is provided a coil spring ||G which normally urges the arm |0| carrying the roller |00 into timer strip engaging position.

Attention is now directed to Figures 2, 20, and 2l, particularly the latter two. It will be noted that the pointer shaft 22 of the pressure gauge passes through a tubular sleeve ||8 and projects beyond the face of the dial 30 over which the pointer 29 secured upon such shaft 22 is adapted to be moved. This sleeve I8 is rotatably mounted by means of the ball bearings I9 within a rotatable drum |20 also rotatably mounted in a xed housing |2| by means of the ball bearings |22. Fixedly mounted just inside of the rear end of the housing |2| is a pinion |23 with which is adapted to-mesh a pinion |24 mounted upon a sleeve |25a rotatable on a s tub shaft |25 carried by the drum |20. The sleeve |256 also carries the pinion |20 meshing with a pinion |21 mounted upon the sleeve ||0.

'I'he drum |20 is provided at its front end with a toothed gear |20.

Referring now to Figure2, it will be noted that there is mounted upon the rotating shaft 50. adjacent its left end in Figure 2, another set of elements which are duplicates in every respect of the two sets previously described. These elements include a toothed ratchet 50h, cams 55h. pawls 51h, pivoted latch members 00h, rollers 00h. links. 00h, and armatures 00b carried by the latch members 00h. The details of these elements mi!! be found by referring again to Figures 3 and 4 wherein are Vshown the corresponding elements designated by the same reference characters without the letter modification.

There are also provided electromagnets 01h corresponding in every respect to magnets 01 and 01a previously described and so positioned as to cooperate with the armatures 00h.

The pivoted links 00h are also provided adjacent their front-ends with the downwardly extending pivoted rods 10b corresponding with the rods 10 and 10a and having at their lower ends pawls (not shown) corresponding exactly to the pawls 11 and 11a.

It will be understood that these pawls are so disposed as to cooperate with the teeth of the gear |20 on the drum |20 whereby when the rods 10b are raised by energizing one of the magnets 51h, the pawl on such rod will engage and rotate the gear |20 one step, then consequently rotate the drum |20 one step. n

Rotation of the drum |20 carries with it the stub shaft |25 mounted on one end thereof and this movement of the stub shaft |25 with the drum |20, causes the pinion |20 on such stub shaft to rotate because of its engagement with the fixed pinion |20 and thus rotate the sleeve |250l on the stub shaft |25. 'Ihis causes rotation of the pinion |20 mounted on` such sleeve and this of course, results in rotation of the sleeve i i5 upon which is the pinion |21 meshing with the pinion |20.

The forward end of the sleeve ||0 is providedv with a bushing |20 upon which is mounted a pointer |00 overlying pressure gauge 00. The electromagnets 01b are electrically hooked up in parallel with the magnets 61a so that each time one of the magnets 01a is energized by operation of the contact maker and breaker therefor and provided with shaft 01a, the corresponding eiectromagnet 01b will also be energized whereby to move the pointer |00 step by step in accordance with the movement of the contact maker and breaker shaft 01a. It will be recalledthat the operation of this contact maker and breaker is brought about by periodical major changes in pressure through the actuation of the timing strip 90. Also that this circuit maker and breaker is the controlling means for the shifting weight in weight housing 9. It will be clear, therefore, that operation of the major pressure change apparatus will result in indicating by means of the pointer |00 over the dial 00, the pressure to which the valve 2 has been adjusted. This affords a check to the operator for by observing this pointer |00 periodically he can ascertain whether or not the proper major adjustments have been made through the timer strip 00.

Referring now again to Figures l2, 13, and i4, it will be observed that at one end of the weight 02 there is provided a supporting strap |0| carrying downwardly extending portions |02 engaging with electrical resistance coils |00 wound around guide members |00 on each side of the guiding rib 00. These resistance windings are suitably electrically connected with an electric meter or other indicator |05 (see Figure 28) sucb indicator being graduated in pounds pressure. whereby the position of the weight 02, translated into pounds pressure may be indicated at a remote point, such as the plant superintendents oiilce of a factory equipped with this apparatus. It will be understood, of course. that identical apparatus is provided in both of the weight housings 0 and i0 so that the position of both weights will be so indicated. In Figure 26 there is shown the indicator |05 corresponding to the weight 02 in the weight housing I0 and the indicator |00 corresponding to the weight in the weight housing 0.

I have provided and illustrated two separate means for recording the pressure changes resulting from the operation of my apparatus, either one or both of which may be used. The nrst is designed for use remote from the apparatus itself as for instance in the plant managers oilice along with the indicators |05 and |00 andthis recorder. one for each of the weight housings, may be an electrical recorder of any desired type tapped into the circuit of the indicators |05 and |00 as shown. clearly in Figure 26. These electrical recorders are indicated at |01 and |00 respectively.

The other recorder is designed for use at the point where the controlling apparatus is mounted. namely, adjacent the outlet pipe of the steam line being controlled. Referring now again to Figure 2, and to Figure 25, it will be noted that mounted above the gear 10 of the iirst circuit maker and breaker described and meshing-with such gear, is a gear |00 suitably mounted for rotation by the gear 10. This gear |00 rotates a shaft |00 upon which is provided'a worm |0| meshing with which is aworm gear |02 on a shaft |00, the opposite end of which is provided with a cam member |00 cooperating with a pivoted lever |05 normally urged in one direction by a spring |00 and the free end of which lever carries a recording element |01 for marking on a movable strip |00l a sprocket |00 being provided for moving such strip.

It will be understood, of course, that ifdesired one of these recording devices may be provided for each one of the step by step circuit makers and breakers which may be identified by the shafts 01 and 01a and the gears 10 and 10a. For clearness, however, only one has been shown.

In Figure 1 of the drawings I have indicated a series of wires ||1 as indicating the electrical connections between the weight housings and the control apparatus and reference should now be had to Figure 26 in which is diagrammatically illustrated the wiring system and electrical means of the apparatus. For convenience I will refer to the weight housing i0 and its mechanism as the auxiliary weight and cooperating means, and to the weight housing 0 and its mechanism as the master weight and cooperating means, it being understood that theauxillary weight is the one which maintains a uniform pressure by responding to slight variations thereof at any set position, whereas the master weight controls the major changes made in the position of the lever 5 and of the valve.

In Figure 26, |50 represents a fuse box in a suitable electric power line, the output of which is 110 volts for operating the solenoids in` the weight housings 9 and I0. The wires |6| and |52 serve all four of the solenoids, the auxiliary solenoids being designated 86 and the master solenoids at 86a. The motor 48 also receives its source of power from these wires. A stepdown transformer |53 is also provided in the line from the transformer |50 and the output of this transformer provides for instance, a six volt current for the actuation of the other electrical devices of the apparatus. The circuit from this transformer may be traced through wire |54 and wires |55 and |56 to the movable contact vanes 38 and 38a on the shafts 31 .and 31a of the contact makers and breakers for the auxiliary and master weights respectively. From these contact varies, the circuit may be traced through the fixed contacts 48 and 48a to the electromagnets 61 and 61a respectively. It will also be noted that the electromagnets 61h are also connected in parallel with the electromagnets 61a whereby they operate simultaneously therewith and if the left hand magnet 61a is energized the left hand magnet is simultaneously energized. Similarly with the right hand magnets 61 and 61h, wires I 51 and |58 provide the circuit means for the magnets 61h.

With reference to the contact makers and breakers 12 for the auxiliary weight and 12a for the master weight, it may be here stated that these contact makers and breakers are four in number, one for each of the solenoids in the weight housings and that they are of the type many varieties of which are known in the market, which normally have one circuit open and one closed and which when actuated, as by the upward movement oi therods 1| and 1|a, operate to close the open circuit and open the closed circuit. It has not been deemed necessary to illustrate the details of this type of circuit maker and breaker as it may take many forms and is u ell known in the art.

These circuit makers and breakers 12 have been illustrated in Figure 26 with the normally closed contact members as X and the normally open contact members as Y. It will be remembered that upon the upward movement of the rods 1| or 1|a, these contact makers and breakers 12 corresponding to such rods are actuated. Assuming therefore that the rod 1|, operated by the left hand magnet 61, is actuated, such actuation will cause the left hand circuit maker and breaker 12 for the auxiliary control to close the contacts Y and open the contacts X. It will be noted that the normally closed contact X when opened will open the .circuit to the right hand magnet 61 and thus eliminate the possibility of such right hand magnet being energized whilc the left hand magnet is energized. It will also be'obvious that closing the contacts Y of the left hand contact maker and bigeaker 12 serves to close the circuit to the left Yhand solenoid 86 of the auxiliary control through the wires |58 and the wires |5| and |52.

Likewise if the rod 1| corresponding to the right hand magnet 61 of the auxiliary control is actuated through energizing such magnet 61, the corresponding contacts Y of the right hand contact maker and breaker 12 will be closed, thus closing the circuit through wires |5| and |52 and wires |60 to the right hand solenoid 86 of the auxiliary control. Also the actuation of this circuit maker and breaker 12 likewise opens the contacts X thereof, thus breaking the circuit to the iefthand magnet s1 rendering it impossible for the same to be energized while the right hand magnet 61 is energized.

'I'he wire |6| provides a series circuit connection for all the normally closed contact members X of the contact makers and breakers 12 and with the circuits of the electromagnets 61 and 61a. It will be apparent from a study of the diagram of Figure 26, that if one of the normally open contacts Y has been closed and therefore its corresponding normally closed contact X opened, it will be impossible to close the circuit to the electromagnet opposite from that one which resulted in closing such contact Y, even though the contact varies 38 should close with the fixed contacts 48 for such opposite magnet.

The operation of these magnets and contact members are identical for both the auxiliary and master controls and further detailed explanation is not deemed necessary.

Wires |62 provide a six volt current through the resistance members |33 on the auxiliary weight device and the resistance members |83a on the master weight device, for the corresponding electrical indicators |35 and |36 and the electrical recorders |31 and |38.

Manually operable switch members |63 and |64 are provided in the solenoid circuits for the weight controls to the auxilary and master weights respectively whereby such weights may be shifted by manual actuation of these switches independent of the automatic control therefor.

There is also provided in combination with the switch |64 a means for the remote control of the master weight whereby the same may be shifted to adjust the valve, from a remote control station, for instance, ten miles away from the valve. This device is illustrated diagrammatically in Figures 26 and 27 where it will bc noted that the switch arm |64 is pivotcd as at |65 and is normally held in vertical position by means of the leaf springs |66. In such position the Contact arm lies between and out of contact with the fixed contacts 561 and |63 which through the circuits as heretofore described. cooperate with the contact arm |54 to complete the circuit and actuate either one cr 'the other of the l noids 86a to shift the master weight in one tion or the other, according to which soleno actuated.

Suitably disposed upon each side of the contact arm |64 are the electr 66 and |10, each of which when energized serves to draw the contact arm 65, as an armature, towards such magnet and into engagement with the adjacent contact |61 or |68.

Wires |1| and |1|a lead from the magnet |68 to a fixed contact |12 and a pivoted contact arm |13 respectively, disposed at any desired remote point. Likewise wires |14 and |14a lead from the magnet |10 to the fixed contact |15 and the contact arm |13 respectively. This contact arm |13 is a manually operable switch arm adapted to be selectively moved into engagement with either of the fixed contacts |12 or |15 to close the circuit to either the magnet |69 or the magnet |10 depending upon which of the master weight controlling solenoids it is desired to actuate. Any suitable source of current may be provided for the circuits between the magnets |69 and |10 and the contact maker and breaker |12, |13 and |15, such as for instance, a battery |16, or by tapping into a regular line current.

There is also provided at this remote control station where the contact maker and breaker |13 is positioned, electric indicators |11 and |18 of the same type as indicators Ill and |00, both indicating the pressure in the steam line, one being actuated by the rheostat device |02 on the auxiliary weight and the other by the rheostat device |32 on the master weight. Suitable wires |10 are tapped into the circuits of the indicators and 20 and extend to the remotely positioned indicators |11 and |10.

'Ihus it is obvious that even though an operator may be positioned at any distance from the valve to be controlled, he is able by virtue of the indicators |11 and |10 to observe the pressure in thelineandifachangeinpresnireisdesiredat any time, and independently of the automatic timer control previously described, such operator merely has to manipulate the contact arm-|13 intermittently into and out of engagement with either of the ilxed contacts |12 or |15, depending upon whether he desires to increase or reduce the pressure, which will result in energizing the corresponding magneti or |10 which thereupon actuates the contact arm |04 into engagement with the corresponding contact |01 or |08. thus actuating the proper solenoid for shifting the master weight and thus varying the adjustment of the valve.

As before stated the contact arm i may be actuated manually and directly if desired and for this purpose it is provided with an insulated nnger piece |00 as shown in Figure 27.

As a rsum of the operations and functions heretofore described, let it be assumed that at a given time during the day, say 9 ocleck in the morning, the desired pressure in the outlet pipe of the steam line is 10 lbs. For such pressure the valve 2 is, of course, at. the required open position and we will justments have been made of the weights on the lever 5 for that pressure. The roller |00 will at this point be riding upon a straight edge of the timer strip so that no change will take place in the position of the master weight in the housing l on the lever 5. With the parts in this position, if any slight increase or decrease in pressure in the pipe occurs for any reason whatever, the pressure gauge will respond to such variation in pressure resulting in operation of the auxiliary weight 02 in the housing i0 to make slight adjustments ofthe valve to compensate for such pressure variations and to maintain the pressure automatically at the. desired lbs.

Assume now that at 6 oclock in the evening the use of steam from the outlet pipe will be lessened due to closing down the factory for the night, leaving perhaps a requirement for only 5 lbs. of steamfor heating purposes through the night. The timer strip will have been so arranged on the sprocket 0l 'that at 6 oclock the roller |00 will ride into a notch of a predetermined depth, depending upon the pressure desired at this time. 'I'his movement of the roller and its attendant parts, will result in a step by step movement of the weight in the housing 9 through the agency of the parts just described, causing the valve lever i to shift its position on its pivot materially and to the extent of closing the valve to permit only 5 lbs. of pressure in the outlet pipe When the roller |00 has reached the bottom of the notch corresponding to this 5 lb. pressure the edge of the timer strip will be again straight and will maintain the roller in that position until the next major change is desired.

It will be understood. of course, that as the pressure is reduced in the manner just described assume that all necessary adby shifting the master weight in the housing l, the gauge on the outlet pipe will, of course, respond to such change in pressure and will result in also shifting the auxiliary weight 02 'in the housing |0 to a balanced position with respect to the master weight in -its new position. In other words, when the change has been coinpleted, the position of the valve lever l will have been changed to the lnew position corresponding to the new pressure and will be balanced in such position the same as before. Likewise if any changes or variations should occur in the pressure in the outlet pipe at this new setting of say 5 lbs., the pressure gauge will show such variations and will automatically actuate through the agencies described, including the auxiliary weight 02 to compensate for and maintain this new pressure. .l

It will be clear that similarly when the opening of the factory occurs and the requirement for steam pressure again is 10 lbs., the roller will ride upwardly upon the appropriately and timed cam edge of the timer strip resulting in the reverse operation of this control mechanism and restoring the pressure to 10 lbs. in the outlet pipe The description of the operation of the remote control means for the device previously made is believed sumciently clear and needs no further ampliiication in this summary.L

It is believed that further detailed description of the operation or the various parts heretofore described is unnecessary as the operation o f most of the various elements was set forth with the detailed description thereof. K

It will be understood, of course, that many changes may be made in details of construction and 'arrangement of parts without :departing from the spirit and scope of my invention. I do not limit myself. therefore, to the exact form hereinshown and described other than by the appended claims.

I claim:

1. In combination with a pressure line, a valve in said linefor controlling the pressure therein, a pivoted lever connected thereto for adjusting the position of said valve with respect to its seat, a weight on said lever movable longitudinally thereof in either direction for varying the adjustment of said valve, weight movingmeans carried by said lever, and pressure actuated electrical means in said line for causing actuation oi' said weight moving means.

2. In combination with a pressure line, a valve in said line for controlling the pressure therein, a pivoted lever connected thereto for adjusting the position of said-valve with respect to its seat, means for automatically maintaining a predetermined pressure in said line comprising a weight on said lever movable longitudinally thereof in either direction for varying the adjustment of said valve, weight moving means carried by said lever, a pressure sensitiveelement in said line. and electrically actuated means controlled by said pressure sensitive element for actuation of said weight moving means.

3. In combination with a pressure line, a valve in said line for controlling the pressure therein, a pivoted lever connected `thereto for adjusting the position'of said valve with respect to its seat, two weights on said lever movable longitudinally in either direction for varying the adjustment of said valve, a weight moving means carried by said lever for each weight,a pressure sensitive element in said line, electrically actuated means controlled by said pressure sensitive element for actuating one of said weight moving means to move one of said Weights, a predetermining timer means, and electrically actuated means controlled by said timer means for actuating the other of said weight moving means to move the other of said weights.

4. In combination with a valve, a pivoted lever connected thereto for adjusting the position of said valve with respect to its seat, a weight on said lever movable longitudinally thereof in either direction for varying the adjustment of said valve, means carried by said lever for moving said valve, a predetermining timer means remote from said valve, and electrically actuated means controlled by said timer for actuating said weight moving means at predetermined intervals.

5. In combination with a pressure line, a balancedyalve assembly in said line i'or controlling the pressure therein including means for balancing said valve, time controlled means for adjusting said valve at predetermined intervals, a pressure sensitive element in said line, and means actuated by said element for actuating said valve balancing means whereby to maintain the pressure in said line in accordance with said predetermined adjustment.

6. In combination with la pressure line, a balanced valve in said line for controlling the pressure therein, time controlled means for adjusting said valve at predetermined intervals, a pressure sensitive element in said line, and means actuated by said element for adjusting said valve to maintain the pressure in said line in accordance with said predetermined adjustment, said last named means comprising a pivoted lever connected to said valve, a weight on said lever movable longitudinally thereof in either direction, and electric means carried in part by said lever for moving said weight.

'7. In combination with a valve, a plurality of means connected with said valve for adjusting the same with respect to its seat, means associated with each of said aforesaid means for actuating the same, time controlled mechanism for actuating one of said actuating means at predetermined intervals, and pressure controlled mechanism for actuating the other of said actuating means independently of said time controlled means.

8. In combination with a valve, a plurality oi' means connected with said valve for adjusting the same with respect to its seat, means associated with each of said aforesaid means for actuating the same, time controlled mechanism for actuating one of said actuating means at predetermined intervals, and pressure controlled mechanism for actuating the other of said actuating means independently of said time controlled means, both of said actuating mechanisms having a common electric circuit maker and breaker.

9. In combination with a valve, a pivoted lever connected thereto for adjusting the position of Said valve With respect to its seat, a Weight and a weight moving means carried by said lever and movable longitudinally thereof in either direction for varying the adjustment of said valve, and remotely controlled electrically actuated means for actuating said Weight moving means.

1G. In combination with a valve, a pivoted lever connected thereto for adjusting the position of said valve with respect to its seat, a Weight and a. Weight moving means carried by said lever and movable longitudinally thereof in either direction for varying the adjustment of said valve, and remotely controlled electrically actuated means for actuating intermittently said weight moving means.

ll. In combination a movable controlling member, means for actuating said member including an element arranged for step by step rotation, pressure actuated electrical means for operating said element, and means for actuating said electrical means independent oi.' said pressure actuated means.

12. In combination a movable controlling member, means for actuating said member including an element arranged for step by step rotation, pressure actuated electrical means for operating said element, and means remote from said controlling member for actuating said electrical means independent of said pressure actuated means.

13. In combination with a valve, means connected with said valve for adjusting the same with respect to its seat, said means including an actuable lever arm and means carried thereby for actuating the arm, time controlled mechanism for actuating said adjusting means at predetermined intervals, pressure controlled mechanism for adjusting said adjusting means independently of said time controlled means, and manually controlled means, independent of both said time andpressure controlled means, for actuating said adjusting means.

14. In combination with a valve, means connected with said valve for adjusting the same with respect to its seat, said means including an actuable lever arm and means carried thereby for actuating the arm, time controlled mechanism for actuating said adjusting means at predetermined intervals, pressure vcontrolled mechanism for actuating said adjusting means independently of said time controlled means and remote manually controlled means, independent of both said time and pressure controlled means for actuating said adjusting means.

15. In combination a movable controlling` member, means for moving said member including an element mounted for step by step rotation, actuating means for said element including an electric Contact maker and breaker comprising two sets of cooperable contacts rotatably mounted one Within the other, said contacts being rotatable in either direction without limit, and means for intermittently moving said contacts into and out of engagement with each other to actuate said element step by step, the moving means for said contacts comprising a pressure sensitive member operatively connected to said contact maker and breaker.

16. In combination a movable controlling mernber, means for moving said member including an element mounted for step by step rotation, actuating means for said element including an electric contact maker and breaker comprising two sets of cooperable contacts rotatably mounted one Within the other, said contacts being rotatable in either direction without limit, means for intermittently moving said contacts into and out of engagement with each other to actuate said element step by step, the moving means for said contacts comprising a pressure sensitive member operatively connected to said contact maker and breaker, and additional means, independent of said pressure sensitive means for actuating said contact maker and breaker.

1'7. In combination a movable controlling membei', means for moving said member including an element mounted for step by step rotation. actuating means i'or said element including an electric contact maker and breaker comprising two sets of cooperable contacts rotatably mounted one within the other. said contacts being rotatable in either direction without limit, means for intermittently moving said contacts into and out of engagement with each other to actuate said element step by step. the moving means for said contacts comprising a pressure sensitive member operatively connected to said contact maker and breaker, and additional means, independent oi said pressure sensitive means for actuating said contact maker and breaker, said additional means being time controlled.

i8. In combination a movable controlling member, means for moving said member including an element mounted for step by step rotation. actuating means for said element including an electric contact maker and breaker comprising two sets ci oocperable contacts rotatably mounted one within the other. said contacts being rotatable in either direction without limit. means for intermittently moving said contacta into and out oi engagement with each other to actuate said element step by step, the moving means for said contacts comprising a pressure sensitive mem ber operatively connected to said contact maker and breaker, additional means, independent of said Ipressure sensitive means for actuating said contact maker and breaker. said additial means being time controlled, and manually operable means, remote from said controlling member and independent of said pressure and time controlled means, for actuating said contact maker and breaker.

FREEMAN H. OWINS. 

